Coupling for fiber pipe



Oct. 11, 1932, H. PARKER 1,831,915

COUPLING FOR FIBER PIPE Filed March 21, 19:50

Z9, 7 7 mm jaw/2i? Patented Oct. 11, 1932 UNITED STATES BERLIN, NEW HAMPSHIRE, A coRPonA'rIoN or MAINE oournm'e roe FInEnfiPiPE Application filed March 21, 1930. Serial No. 437,693.

This invention relates toan improved coupling device for securing together the ends of fibrous pipe. Owing to its lightness and strength, as well as its toughness and comparative cheapness, waterproofed fibrous pipe is desirable for many purposes in preference to pipe of other materials. Such pipe has additional advantages since it is not subject to attack by acids or alkalis and, therefore, does not corrode. Practical difii. culties, however, have been encountered in the past in devising a simple but efficient coupling means to secure together the ends of successive sections of pipe of this variety. According to the present invention, a coupling is provided which is not only strong, but is also simple and economical.

For a more complete understanding of the invention, reference may be had to the description which follows and to the drawing, ,of which,

Figure 1 illustrates a joint between the ends of two sections of fibrous pipe, the view being partly in section.

Figure 2 is a transverse section on the line 22 of Figure 1.

Figure 3 is an elevation of one of the elements employed in the coupling shown in Figure 1.

Figure 4: is a section on the line H of Figure 3.

Figure 5 is a section on the line 55 of Figure 3.

Figure 6 is an elevation of a modified form of coupling, the view being partly in section.

Figure 7 is a similar view of another modification.

Referring to the drawing in detail, 10 represents the end portions of fibrous tubes to be coupled together. Tubes of this type may be made of cellulosic pulp which may first be formed in a wet web to be wound upon itself on a mandrel, under pressure, until the desired wall thickness is obtained. Such a tube when properly dried has relatively great mechanical strength and can be impregnated,

with suitable waterproofing materialsuch as asphalt, pitch or the like. If such tube is to be employed for conducting water or other liquids, the tube should also receive a coating N wall conforming to the wavy shapeof the 1 ATE'JN CE 1 HOWARD PARKER, OFT-BERLIN, NEW HAMPSHIRE, AssIGNoR Tb BROWN coivirenv, or

ofsuitable material such as-blown orioz'z'idized'asphalt or the like toprevent access of moisture to the interior of the walls. G -According to the invention a tube such as described may have its ends suitably shaped by means ofa powerful pressor by spinning the ends ina lathe Although the ,walls of a tube which hasbeenmade as hereinbefore described are relatively dense, they are subject to a slight additional compression by which theend portions may be shaped as shown-in Figure 1. 4 ;Prior tothe application of such shaping pressure, a sleeve 11 of sheet'ironor other suitable materialis slipped over the end-portion so that when the shaping pressure is applied the sleeve 11 lSIShiLPGd'fiS well as the-tube wall. A portion of thesleeve may be pressed into aseries of ridges and depressions as at 1-2, the outer surface of thetube' surrounding sleeve. The portion of the sleeve adjacent to the end of the tube maybe is preferably provided with an outwardly ex- The flanges are each provided with a number of perforations which are suitably spaced to register with each other to receive bolts 16 therethrough. Within the bent up rim of the flange 14:, a number of suitable elements 17 maybe provided tostifi'en the flange 14 by pressure of nuts 18 which are set up onthe bolts 16. Similarly a set of elements 17may be employed'against the flangeIS to distribute;

shape "to within""the of the (squeezed so as to taper inward slightly, as V 7 shown in Figure 1, if desired. Each, sleeve tending fiange,'the.fiange 13 on oneof the i sleeves of the coupling being slightly greater in'diam eter than the flange 14 of the mating sleeve. The flanges 13and 14may be-bent over as shown in Figure 1 so that the bent rims may telescope together and provide a a relatively tight protective casing. The bent rims also serve tostifi'en the-flanges. Afring of packing material 15 may be employedbetweenthe flanges to make the joint tight.;

distributing over its entirecircumference the.

flange 14. Each element 17 is perforated as at '19 to receive a bolt 16, a flat elevated central portion beingprovided on the upper may be in the face of each said element to beengaged by one ofthe nuts 18. As illustrated in'Figures 3, 1 and 5 of the drawing, theelements 17 formof a'shell stamped from sheet metal.' This shell may be suitably shaped,as illustrated, for effective distribue tion of pressure shaped so as to have a nearly circular transversesection at every point, the longitudinal sections being approximately semi-elliptical,

as 'shovvninxFigure 4:. The elements 17 permit the use of relatively thin metal for the V sleevesll, This is both economical and otherof the fiber tubes 10 preferably of heavy cast wise advantageous in that when made of such metal the sleeves/may be more readily pressed tos'hape on the ends ofthe fibrous tubes.

,A modified form of the invention is illustratedin Figure 6. According to this form of the invention, sleeves 21, similar to the sleeves 11, are pressed orrspun on the ends These sleeves, hovv- 7 from thefnuts 18 on the edge Y of the shell which pressesdirectly against the" flange 14. To this end the elements jniaybe vwall of the tube so as to indent the same,

flanges on the abutting ends ofsaid sleeves, and means for clamping saidflanges together, said clamping meansincludinga plurality of pressure distributing elements against one of said 'flanges',a plurality of bolts each pass-V ments, and a nut on each bolt.

:In'testimony whereof I have aflixed'fmy signature. a v w HOWARD, PARKER ing thfOugh said flanges and one of said ele-v ever,'haveno flanges integral'therevvith'. In-

stead of the integral'flanges as in Figure 1,

separate flangesv 22 are provided, these being ing collar 26 is Welded or to the end portion of eachsleeve, therein- 'force'being' sufficiently thick to permitthe metal. {A reinforcotherwlse secured cutting ofaserew thread for engagement 'With a mating thread on'the inner surface of each flan e 22v Suitable bolts 23 and nuts 24: ma be employed to secure opposing YT 30-is pressed into Wavy form over a'portion flanges '22 to each other vvitha gasket 25between; The flanges 22 ar'e'e ach secured to 'a'corresponding sleeve 21. 1 A slightly diflerent'modification is illustrated in Figure 7 In this form the sleeve of itslength to grip the wall of the fiber tube. In addition, the portion of the sleeve adjacent theend of the tube may be pressed 7 or otherwise formed into the shape of, a screw 4 thread on Which a flange member 31 may be p on the abutting screwed, "or the sleeve may be spot-Weldedtothe flange 31 if these parts are made of V 'metal'suitable for the purpose; "member may be secured to a similar flange 31 vpipe as by bolts 23 and 1'. Acoupling for fiber tubing, comprising This flange a pair of sheet metal sleeves fitted on abut I ting end portions of a pair of fiber tubes and pressed into intimate engagement therewith, said jf abutting ends of said sleeves and substantialsaid sleeves having portions indenting l v 7 i the Walls of the tubes,mating'flanges on the 1y flush with the respective ends of Said tubes, n, flangeshaving their rims bent to fit ,7 I one Withinthef.other,'-and means for clamp- 

